Arch web type ultra-high performance concrete prefabricated shield tunnel segment structure and design method
An ultra-high-performance, tunnel segment technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of stress relaxation bolt joints between ring joints, poor crack resistance, water leakage, concrete damage, etc., to achieve The effect of reducing the amount of concrete used, alleviating serious water leakage, and improving bearing capacity
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Embodiment 1
[0155] Such as Figure 1-11 As shown, a soffit type ultra-high performance concrete prefabricated shield tunnel segment, including:
[0156] Soffit 1, located in the soffit area of the main body of the ultra-high performance concrete segment;
[0157] Segment seam groove 2;
[0158] Straight bolt reserved hole 4;
[0159] The first reinforcing rib 3 is located at the reserved hole 4 for straight bolts;
[0160] The local reinforcement band 5 is located at the edge of the main body of the segment;
[0161] Segment grouting hole 6;
[0162] The second reinforcing rib 7 is located at the grouting hole 6 of the segment;
[0163] Hand hole 8, near the hand hole 8 is the concrete reinforcement area;
[0164] Local reinforcement with steel bars 9;
[0165] The soffit steel bar 10 is located in the soffit area of the main body of the segment;
[0166] The spiral steel bar 11 is located at the grouting hole 6 of the segment.
[0167] 1) The soffit area of the main body o...
Embodiment 2
[0180] A shield tunnel segment has an outer diameter of 6000mm and a ring width of 1500mm. The overall tunnel segment is made of ultra-high performance concrete material, the concrete grade is UC120, the steel bar type is HRB400, the thickness of the concrete cover layer is 20mm, the design load of the minimum reinforcement ratio is the maximum positive bending moment design value of 277.0kN·m, and the corresponding axial force design Value - 1867.5kN.
[0181] The design method of the main soffit area of the soffit ultra-high performance concrete shield tunnel segment is as follows:
[0182] 1. According to the strength of the ultra-high performance concrete material used, the type of steel bar and the internal force generated by the external load calculated according to the code, the longitudinal normal section size of the segment is determined, and the thickness h of the vault is determined 1 and arch foot thickness h 2 .
[0183] Preliminary drafting of vault thicknes...
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